Q44492: Mandelbrot Example Needs to Change "LogicY" to a SINGLE

Article: Q44492
Product(s): See article
Version(s): 4.00 4.00b 4.50
Operating System(s): MS-DOS
Keyword(s): ENDUSER | B_BasicCom docerr | mspl13_basic
Last Modified: 20-DEC-1989

The MANDEL.BAS program example on Pages 213-217 of the "Microsoft
QuickBASIC 4.5: Programming in BASIC" manual for Version 4.50, on
Pages 263-267 of the "Microsoft QuickBASIC 4.0: Programming in BASIC:
Selected Topics" manual for Versions 4.00 and 4.00b, and on Pages
211-215 of the "Microsoft BASIC 7.0: Programmer's Guide" for Microsoft
BASIC PDS Version 7.00 does not work correctly for all WINDOW
coordinates, unless the variable "LogicY" is changed to a SINGLE or
DOUBLE precision variable.

To correct the problem, change all occurrences of LogicY to LogicY! or
add the following line to the beginning of the program:

   DIM LogicY AS SINGLE

This information applies to QuickBASIC Versions 4.00, 4.00b, and 4.50
for MS-DOS, to Microsoft BASIC Compiler Versions 6.00 and 6.00b for
MS-DOS and MS OS/2, and to Microsoft BASIC PDS Version 7.00 for MS-DOS
and MS OS/2.

For more information, query on the following words in this
Knowledge Base:

   PMAP and MAP and WINDOW and INTEGER

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